My intention is not to dispute the word of the other hams who have posted here, as I see no fault with their reccomendations, however, if looking at your question from a slightly different perspective, perhaps a different answer might be in order. If you move your portable / mobile setup from vehicle to vehicle on a regular basis, I would consider a Hustler/Newtronics Model UGM quarter wave magnet mount. These are nifty little antennas which are convenient to use and perform very well. Although they use RG-174 type mini cable, which has a reputation for being lossy, The ones I have used have always performed very well. I think they are rated at 25W or so but for what it's worth, I have run them in conjunction with an Icom 2100H at high power (47W out as measured) and the SWR was 1.5 or less across the entire 2 meter band and there was no heating of the coax or other undesireable behavior. If your mount is for one vehicle,then the 5/8 wave antennas are definitely the only way to fly. If you just want something to get your signal out of your vehicle and on top of it, the UGM might be the ticket. Ray

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